linux-kernel - [PATCH v2 0/9] Enable QUPs and Serial on SA8255p Qualcomm platforms

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Message-ID: <20250418151235.27787-1-quic_ptalari@quicinc.com>
Date: Fri, 18 Apr 2025 20:42:26 +0530
From: Praveen Talari <quic_ptalari@...cinc.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby
	<jirislaby@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Viresh Kumar
	<vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Stephen Boyd
	<sboyd@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Praveen Talari
	<quic_ptalari@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-serial@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-pm@...r.kernel.org>
CC: <psodagud@...cinc.com>, <djaggi@...cinc.com>, <quic_msavaliy@...cinc.com>,
        <quic_vtanuku@...cinc.com>, <quic_arandive@...cinc.com>,
        <quic_mnaresh@...cinc.com>, <quic_shazhuss@...cinc.com>
Subject: [PATCH v2 0/9] Enable QUPs and Serial on SA8255p Qualcomm platforms

The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM. The device
drivers request resources operations over SCMI using power and
performance protocols.

The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GPIOs) using runtime PM framework APIs,
such as resume/suspend, to control power states(on/off).

The SCMI performance protocol manages UART baud rates, with each baud
rate represented by a performance level. Drivers use the
dev_pm_opp_set_level() API to request the desired baud rate by
specifying the performance level.

The QUP drivers are SCMI clients, with clocks, interconnects, pinctrl
and power-domains abstracted by a SCMI server.

Nikunj Kela (3):
  opp: add new helper API dev_pm_opp_set_level()
  dt-bindings: serial: describe SA8255p
  dt-bindings: qcom: geni-se: describe SA8255p

Praveen Talari (6):
  soc: qcom: geni-se: Enable QUPs on SA8255p Qualcomm platforms
  serial: qcom-geni: move resource initialization to separate function
  serial: qcom-geni: move resource control logic to separate functions
  serial: qcom-geni: move clock-rate logic to separate function
  serial: qcom-geni: Enable PM runtime for serial driver
  serial: qcom-geni: Enable Serial on SA8255p Qualcomm platforms

 .../serial/qcom,sa8255p-geni-uart.yaml        |  66 ++++
 .../soc/qcom/qcom,sa8255p-geni-se-qup.yaml    | 107 ++++++
 drivers/opp/core.c                            |  22 ++
 drivers/soc/qcom/qcom-geni-se.c               |  77 ++--
 drivers/tty/serial/qcom_geni_serial.c         | 351 ++++++++++++++----
 include/linux/pm_opp.h                        |   6 +
 6 files changed, 528 insertions(+), 101 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/serial/qcom,sa8255p-geni-uart.yaml
 create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,sa8255p-geni-se-qup.yaml


base-commit: bc8aa6cdadcc00862f2b5720e5de2e17f696a081
-- 
2.17.1